[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [ 30.317654] audit: type=1800 audit(1540287927.117:33): pid=5320 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 30.340132] audit: type=1800 audit(1540287927.117:34): pid=5320 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 33.628849] audit: type=1400 audit(1540287930.427:35): avc: denied { map } for pid=5494 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Warning: Permanently added '10.128.10.27' (ECDSA) to the list of known hosts. executing program [ 40.270969] audit: type=1400 audit(1540287937.067:36): avc: denied { map } for pid=5508 comm="syz-executor225" path="/root/syz-executor225494925" dev="sda1" ino=16483 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 40.275986] kasan: CONFIG_KASAN_INLINE enabled [ 40.302036] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 40.309501] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 40.315730] CPU: 0 PID: 5508 Comm: syz-executor225 Not tainted 4.19.0+ #77 [ 40.322727] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.332087] RIP: 0010:rb_erase+0x306/0x3710 [ 40.336413] Code: c7 81 28 01 00 00 f2 f2 f2 f2 c7 81 2c 01 00 00 00 f2 f2 f2 48 89 f9 65 48 8b 1c 25 28 00 00 00 48 89 5d d0 31 db 48 c1 e9 03 <42> 80 3c 01 00 0f 85 41 1c 00 00 4c 8d 48 10 4c 8b 78 08 48 b9 00 [ 40.355308] RSP: 0018:ffff8801b487e918 EFLAGS: 00010202 [ 40.360664] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 40.367934] RDX: 1ffff1003690fd2b RSI: ffffffff8afc0860 RDI: 0000000000000008 [ 40.375224] RBP: ffff8801b487f320 R08: dffffc0000000000 R09: fffffbfff12d69a0 [ 40.382487] R10: fffffbfff12d69a0 R11: ffffffff896b4d03 R12: ffff8801b13353b0 [ 40.389753] R13: dffffc0000000000 R14: ffff8801b487f2f8 R15: ffff8801b487f438 [ 40.397018] FS: 00000000025ca880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 40.405230] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 40.411107] CR2: 0000000020000080 CR3: 00000001c4827000 CR4: 00000000001406f0 [ 40.418363] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 40.425628] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 40.432902] Call Trace: [ 40.435488] ? lockdep_on+0x50/0x50 [ 40.439099] ? rb_insert_color+0x1460/0x1460 [ 40.443495] ? noop_count+0x40/0x40 [ 40.447107] ? lock_pin_lock+0x350/0x350 [ 40.451152] ? mark_held_locks+0x130/0x130 [ 40.455386] ? kasan_check_read+0x11/0x20 [ 40.459520] ? noop_count+0x40/0x40 [ 40.463130] ? lock_pin_lock+0x350/0x350 [ 40.467176] ? mark_held_locks+0x130/0x130 [ 40.471400] ? check_usage_forwards+0x3e0/0x3e0 [ 40.476070] ? __bfs+0x385/0x7a0 [ 40.479420] ? noop_count+0x40/0x40 [ 40.483047] ? check_usage+0x1a9/0x790 [ 40.486917] ? lock_pin_lock+0x350/0x350 [ 40.490984] ? check_usage_forwards+0x3e0/0x3e0 [ 40.495640] ? __bfs+0x385/0x7a0 [ 40.498991] ? modules_open+0xa0/0xa0 [ 40.502773] ? lockdep_on+0x50/0x50 [ 40.506389] ? lock_pin_lock+0x350/0x350 [ 40.510438] ? mark_held_locks+0x130/0x130 [ 40.514661] ? kasan_check_read+0x11/0x20 [ 40.518791] ? __lock_acquire+0x2881/0x4ec0 [ 40.523124] ? mark_held_locks+0x130/0x130 [ 40.527354] ? print_usage_bug+0xc0/0xc0 [ 40.531408] ? _raw_spin_unlock+0x2c/0x50 [ 40.535555] ? graph_lock+0x170/0x170 [ 40.539358] ? ext4_exit_mballoc+0xc0/0xc0 [ 40.543589] ? __lock_acquire+0x7ec/0x4ec0 [ 40.547806] ? find_held_lock+0x36/0x1c0 [ 40.551855] ? mark_held_locks+0x130/0x130 [ 40.556073] ? lock_downgrade+0x900/0x900 [ 40.560204] ? ext4_es_scan+0x960/0x960 [ 40.564164] ? lock_release+0x970/0x970 [ 40.568126] ? do_raw_write_trylock+0x1c0/0x1c0 [ 40.572779] ? kasan_check_write+0x14/0x20 [ 40.576996] ? lock_acquire+0x1ed/0x520 [ 40.580951] ? integrity_inode_free+0x77/0x320 [ 40.585520] ? ext4_es_remove_extent+0x151/0x500 [ 40.590257] ? lock_release+0x970/0x970 [ 40.594220] ? kasan_check_write+0x14/0x20 [ 40.598440] ? do_raw_write_lock+0xbd/0x1e0 [ 40.602747] integrity_inode_free+0x12f/0x320 [ 40.607226] security_inode_free+0x19/0x90 [ 40.611446] __destroy_inode+0x328/0x820 [ 40.615508] ? generic_update_time+0x450/0x450 [ 40.620074] ? evict+0x5d8/0x980 [ 40.623425] ? lock_downgrade+0x900/0x900 [ 40.627559] ? __inode_wait_for_writeback+0x2cf/0x380 [ 40.632733] destroy_inode+0xda/0x200 [ 40.636517] ? __destroy_inode+0x820/0x820 [ 40.640736] ? kasan_check_write+0x14/0x20 [ 40.644954] ? do_raw_spin_lock+0xc1/0x230 [ 40.649177] evict+0x5e0/0x980 [ 40.652366] ? destroy_inode+0x200/0x200 [ 40.656424] ? iput+0x671/0xa90 [ 40.659689] ? lock_downgrade+0x900/0x900 [ 40.663824] ? kasan_check_read+0x11/0x20 [ 40.667960] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 40.672544] ? lock_downgrade+0x900/0x900 [ 40.676698] iput+0x679/0xa90 [ 40.679788] ? inode_add_lru+0x2a0/0x2a0 [ 40.683834] ? up_write+0x7b/0x220 [ 40.687356] ? up_read+0x110/0x110 [ 40.690906] ? up_read+0x110/0x110 [ 40.694440] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 40.699960] ? check_preemption_disabled+0x48/0x280 [ 40.704964] ext4_ioctl+0x236f/0x4210 [ 40.708753] ? ext4_ioctl_group_add+0x560/0x560 [ 40.713413] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 40.719196] ? kasan_check_read+0x11/0x20 [ 40.723329] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 40.728608] ? rcu_bh_qs+0xc0/0xc0 [ 40.732132] ? unwind_dump+0x190/0x190 [ 40.736007] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 40.741616] ? avc_has_extended_perms+0xab2/0x15a0 [ 40.746534] ? convert_from_fxsr+0x157/0x7d0 [ 40.750923] ? avc_ss_reset+0x190/0x190 [ 40.754884] ? save_stack+0xa9/0xd0 [ 40.758493] ? save_stack+0x43/0xd0 [ 40.762103] ? __kasan_slab_free+0x102/0x150 [ 40.766496] ? kasan_slab_free+0xe/0x10 [ 40.770452] ? kmem_cache_free+0x83/0x290 [ 40.774581] ? putname+0xf2/0x130 [ 40.778016] ? do_sys_open+0x54d/0x700 [ 40.781883] ? __x64_sys_openat+0x9d/0x100 [ 40.786103] ? do_syscall_64+0x1b9/0x820 [ 40.790149] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 40.795502] ? ___might_sleep+0x1ed/0x300 [ 40.799635] ? arch_local_save_flags+0x40/0x40 [ 40.804204] ? kasan_check_write+0x14/0x20 [ 40.808422] ? trace_hardirqs_off+0xb8/0x310 [ 40.812818] ? ext4_ioctl_group_add+0x560/0x560 [ 40.817469] do_vfs_ioctl+0x1de/0x1720 [ 40.821343] ? ioctl_preallocate+0x300/0x300 [ 40.825746] ? selinux_file_mprotect+0x620/0x620 [ 40.830492] ? path_openat+0x1ae1/0x5160 [ 40.834565] ? rcu_read_lock_sched_held+0x108/0x120 [ 40.839594] ? kmem_cache_free+0x24f/0x290 [ 40.843815] ? putname+0xf7/0x130 [ 40.847256] ? do_syscall_64+0x9a/0x820 [ 40.851221] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 40.856764] ? security_file_ioctl+0x94/0xc0 [ 40.861178] ksys_ioctl+0xa9/0xd0 [ 40.864617] __x64_sys_ioctl+0x73/0xb0 [ 40.868491] do_syscall_64+0x1b9/0x820 [ 40.872368] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 40.877734] ? syscall_return_slowpath+0x5e0/0x5e0 [ 40.882646] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 40.887471] ? trace_hardirqs_on_caller+0x310/0x310 [ 40.892473] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 40.897470] ? prepare_exit_to_usermode+0x291/0x3b0 [ 40.902501] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 40.907342] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 40.912516] RIP: 0033:0x440009 [ 40.915693] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 40.934607] RSP: 002b:00007ffc9c5a2dd8 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 40.942306] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 40.949558] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003 [ 40.956809] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 40.964066] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890 [ 40.971337] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 40.978595] Modules linked in: [ 40.982132] ---[ end trace 2bedbde6e8686211 ]--- [ 40.986957] RIP: 0010:rb_erase+0x306/0x3710 [ 40.991269] Code: c7 81 28 01 00 00 f2 f2 f2 f2 c7 81 2c 01 00 00 00 f2 f2 f2 48 89 f9 65 48 8b 1c 25 28 00 00 00 48 89 5d d0 31 db 48 c1 e9 03 <42> 80 3c 01 00 0f 85 41 1c 00 00 4c 8d 48 10 4c 8b 78 08 48 b9 00 [ 41.010194] RSP: 0018:ffff8801b487e918 EFLAGS: 00010202 [ 41.015600] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 41.022888] RDX: 1ffff1003690fd2b RSI: ffffffff8afc0860 RDI: 0000000000000008 [ 41.030262] RBP: ffff8801b487f320 R08: dffffc0000000000 R09: fffffbfff12d69a0 [ 41.037548] R10: fffffbfff12d69a0 R11: ffffffff896b4d03 R12: ffff8801b13353b0 [ 41.044833] R13: dffffc0000000000 R14: ffff8801b487f2f8 R15: ffff8801b487f438 [ 41.052091] FS: 00000000025ca880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 41.060336] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 41.066244] CR2: 0000000020000080 CR3: 00000001c4827000 CR4: 00000000001406f0 [ 41.073551] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 41.080820] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 41.088106] Kernel panic - not syncing: Fatal exception [ 41.094477] Kernel Offset: disabled [ 41.098102] Rebooting in 86400 seconds..